SSSL28's profile

Regular Visitor

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5 Messages

Tue, Feb 18, 2020 2:00 PM

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SB6141 randomly rebootiing

Hello, I have a SB6141 modem that is randomly rebooting for the pass two weeks. I have try replacing splitter in side the house, move SB6141 modem to different location with different power source and new coax cable, have check the splitter outside of house and still reboot randomly. 

Below is log file and signal output. I like to know if there is a power supply issue with SB6141 modem. Any assistance is greatly appreciated. Thanks in advance.

 

Log1 02182020.PNGsignal1 02182020.PNG

EG

Expert

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90.5K Messages

2 y ago

Can't see your pics. Since you are a new poster, they need to be approved by a Forum Admin. That could take some time. In the interim, you could try hosting them at one of those free third-party pic hosting sites like Imgur or Photobucket and post the link to them here.

Regular Visitor

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5 Messages

2 y ago

Here is the link for SB6141 logs.

https://imgur.com/a/TLYyQ1s

EG

Expert

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90.5K Messages

2 y ago

The downstream power is weak and the SNR's on some of the channels are too low / out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

EG

Expert

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90.5K Messages

2 y ago

Much better including the upstream power is better. It would appear that the problem lies with the wiring / hardware on your side of the demarc point / grounding block.

Regular Visitor

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5 Messages

2 y ago

After much troubleshoot. Here is an output from outside of the house connect just to ground coupler.

Please let me know if downstream power weak and SNR still low/out of spec before I contact Comcast. Thanks in advance.

 

https://imgur.com/a/QMoUhrj

 

 

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